Scale-factor ratios involve exactly. Replacing this by is accurate only when both redshifts are large; it cannot justify an exact zero-redshift identity.

Ancestors (10)

  1. Baryon catch-up approximation after recombination
  2. Total and relative density modes of two pressureless matter fluids
  3. Baryon--cold-dark-matter relative density mode
  4. Baryon transfer function
  5. Cosmological transfer function
  6. Linear cosmological perturbation theory
  7. Cosmology
  8. Branches of physics
  9. Physics
  10. Home

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